UH-1D helicopter lands during Operation Big Spring in North of Bien Hoa, South Vietnam. U.S. 2D Battalion 503D Infantry 173D Airborne Brigade soldiers unload marmite cans and other food supplies from the helicopter. UH-1D takes off. Soldiers waiting in brush. (Vietnam War period).
U.S. 2D Battalion 503D Infantry 173D Airborne Brigade soldiers walk cautiously through jungle during Operation Big Spring in North of Bien Hoa, South Vietnam.. Cave entrance. Soldiers walk across clearing. Scout dog leading soldier. Other soldiers follow. Soldiers waiting for helicopters to arrive. Two officers looking at map. (Vietnam War period).
U.S. 2D Battalion 503D Infantry 173D Airborne Brigade Soldiers move through mess line in clearing during Operation Big Spring in North of Bien Hoa, South Vietnam. Radio operator eating. Soldiers going through the mess line. Soldier give can to another soldier. (Vietnam War period).
U.S. 2D Battalion 503D Infantry 173D Airborne Brigade officer looking at map on table in base camp during Operation Big Spring in North of Bien Hoa, South Vietnam.. U.S. Soldiers firing 81mm mortar. CH-47 helicopter landing with slingload of ammunition. Soldiers unload a generator from CH-47. Soldiers load generator onto M-274 mechanical mule. M-274 drives off. (Vietnam War period).
Stack of 105mm howitzer rounds during Operation Big Springs in North of Bien Hoa, South Vietnam. U.S. 2D Battalion 503D Infantry 173D Airborne Brigade soldier setting up an M-102, 105mm Howitzer in field. (Vietnam War period).
U.S. Marines of 1st Battalion, 26th Division, move through thick grass and climb up Hill 557, Khe Sanh, Vietnam. Arms include M-16 rifles and equipment includes PRC-25 back pack radio. U.S. Marines prepare a demolition charge of C-4 explosive, and insert fuse into the C-4 and place it along with other explosives at the base of a tree. Two Marines pull the pins on fuses of C-4, and smoke rises from the burning fuses. The resulting explosion destroys the tree. Marines return to the site with entrenching tool. (Vietnam War period).